Pump



Jung 23, 1942. SJF, ANDERSON 2,287,369

PUMP

Filed Jan. 51. 1930 s sheets-sheet 1 19 43 f1' je J4 z'* l 7]/ l/A'-.Z YL l' Erw L I 2 E2! Q 611 l l Y Z1 42 f7 ,17

.- Patented June 23, 1942 UNITEDSTATES PATENT OFFICE vPUMP Swan F.Anderson, Rockford, Ill. Application January 31, 1940, serial No.316,472

14 claims. (cl. 10s-136) This invention relates to pumps, and hasspecial reference to a pump structure particularly well suited forhandling semi-liquids or thick and viscous liquids, though equallycapable of handling liquids of nigh uidity.

An important object of the invention is the provision .of a rotary pumpof generally im- 'proved design including the provision of a simpliedconstruction which may be made at lower cost, a construction which maybe easily and thoroughly cleaned, and may be disassembled with a minimumof' eiort to accomplish the cleaning thereof, and including a novelarrangement of parts and a novel construction for preventing leakagefrom the pump.

Other objects and advantages will appear from the following descriptionand the accompanying drawings, in which- Figure 1 is a side view showingone embodiment of my invention;

' Fig. 2 is an end view showing anadjusted position thereof;

Fig. 3 is a vertical section Ataken longitudnally through the pump;

Figs. 4 and 5 are fragmentary views through the spider hub showing thestructure by which leakage is prevented; f

Fig. 6 is a section on the line,66 of Fig. 3; Fig. 6a is a diagrammaticView of a pump vane showing the structure thereof; i

Fig. '7 is a section on the line 1-1 of Fig. 3;

changing the speed of the shaft which projects therefrom to a speeddifferent from that of the armature shaft. Attached to and forming theend wall of the gear casing I3 is a plate I4 hav- Aing an opening I5through which a driven shaft I6 projects. Attached to the plate I4l is aU- Ashaped yoke designated generally by the numeral `I1 having a centralportion VI8 and outwardly extending arms I9 and 2|. The central por'tion I8 is provided with a bore 22 through which the shaft I6 projects,and a counterbore 23 adapted to receive a boss 24 on the plate I4 forthe purpose of locating the bracket with respect to the plate.The-bracket is secured thereto by a plurality of cap screws 25 `or byother suitable means. It will be understood, of course, that the yokemay take a number of different specific formsandthe arms may becylindrical portions and still perform the required function.

Seated between the arms I9 `and 2| is a sleeve 26 having an annular endflange 21 and a portion 28A at the opposite end thereof, which porf tionis of reduced cross-section and seats within Fig. 8 'is a fragmentarytop view showing the means for adjusting the vcapacity of the pump;

Fig. 9 is ra. side view of the pump spider, and Fig. 10 is a horizontalsection taken longitudinally through a modiiiediorm .of the pump.

In the embodiment of the invention herein shown, the pump is attacheddirectly to the hous- -ing of a motor, but in certain phases theinvention is not limited to such a construction, but may beindependently mounted and driven from a motor in the usual manner. Thestructure herein shown is designed particularly for the handling of icecream and other dairy products. and thus has certain features directedto a socalled sanitary pump in which all of thepump k parts which comeinto contact with the matef sanitary solids in suchcorners. The numeral|I` designates a conventional electric motor, in this instance having anend bell I2 togwhich is attached a gear casing I3 for the purpose of thebore-22,.the endof'the sleeve being spaced ^from the bottom of thecounterbore 23 a short distance as shown at 29 to provid? a narrowannular chamber 3l surrounding the shaft I6. The sleeve 26 has a bore 32in the area 28 of reduced cross-section and a counterbore 33 ofsubstantially greater diameter, the bore and counterbore being connectedby a conical portion 34.*' The bore 32 is of slightly greater diameterthan the shaft i6, (and the shaft is received therein.

The shaft I6 has a cylindrical portion 35 which projects slightly beyondthe bore 32, as best shown in Fig. 3, and thereafter tapers inwardlyshaft I6, whereby the hub portion 38 seats in the area betwen thesquared portion 31 of the shaft and the counterbore of the sleeve 26.Preferably the hub portion has clearancey with respect to thecounterbore of the sleeve 26,4 as best shown in Fig. 3.

The flanged end 21 of the sleeve 26 forms one end member of a pumpcylinder which also includes a pump cylinder member designated gerithenut 41.

erally by the numer'al 42 and an end plate 43. The cylinder member 42has a depending lug 4 4 which seats freely in a slot 45 extendinglongitudinally of the leg 2| and has an upstanding pin 46 upon which isreceived for free rotation a nut 41 having a handle or lever and anexteriorly threaded offset sleeve portion 48 which seats in a threadedopening in the arm I9, which threaded tral bore 64 and laterallydisposed iianges 65 and opening communicates with a longitudinallydisposed slot 49 extending from the end of the. arm I9 inwardly. TheVupper'end of the pin 46H5 threaded for the reception of -a wing nut 5||which co-acts with the nut 4.1 and threaded portion 48 to vary theposition of the cylinder portion 42. The cylindernportion 42 has ashoulder 52 annularly of the pin 46 against which the lower end of thethreaded sleeve'portion 48 seats, whereby upon jl-oosening of the nut 5|and rotation of the nut 41 in one direction, the cylinder member isforced downwardly with'respect to Figs. 3 and 6, and upon rotation ofthe nut 41 in the offset direction the cylinder member is moved upwardlywith respectto the remainder of the parts. the purpose of preventingaccidental rotation of The lug `44 serves to locate the lower end of thecylinder member .with vrespect tothe i The pin 46 is of slightly lesserdiameter than the Width of the slot 49 wherebyupon removal of the nuts4,1 and 5| the cylinder mem- The nut v5| alsoservesas a lock nut i'orA66 provided with exterior threads 61 and 68 and l central passages 69and 1| for the transmission of duid vto and from the cylindrical bore64, which bore forms the chamber of the pump (note Fig. 6). As will benoted from Fig. 9, the spider portion 39 is of somewhat greater diameterthan the hub portion 38 and is connected thereto by an arcuate shoulder12 .extending annuiarly of the spider' member. The spider portion has inthis instancefour vanes equally spaced around .the spider portion,` eacho1' the vanesbemg seated in an opening 13. Each of these openings hasparallelly disposed sides 14 and .15 adapted to bear against a vane 16seated therein so as to substantiallyprevent the passage of uid alongthe interface Lbetween thev sides of the vane and the sides of theopening. y Each of these vanes has parallelly disposed sides 11 and 18and aconvex edge 19 and a concave edge 8|. The convex edge- 19 of -thevanes. is adapted to bear against a plug 82 which is seated in anaxial'bore 83 within o tact with-the loor'ev u.

ber may be moved endwise to remove the cylin;

der from the yoke, the pin 46 and the lug 4/4 moving through the slots45 and 49. plate 43 is of generally cylindrical shape, as best shown inFig. 7, and has a depending lug 58 received in the lslot 45 and anupstanding lug 54 freely received lin the slot 49, so "that the plateunless heldy as' presently described, can be re" moved by merely slidingthe plate toward the left facing Fig. 3 until the lugs 53 and. 54 aredisengaged from the slots 45 and 49.

The parts are held infassembled relation by a yoke bar 55 having a.thickenedcentral portion, the ends 56 and 51 of which are received ingrooves 58 and 59` inthe arms 2| and I9, respectively, these groovesextending transversely to the slots 45 and 49. The bar 55 is of greaterwidth than the width of the slots 45 and 49 so that there is The end thespider portion 99, the relationship of the parts being such that theedges 19 of all of the vanes are continuously in seating contact withthe plug 82 to maintain the vanes in sealing con- Seated in the concaveedge'8l ofv the vane isla rocker member 83 having an arcuate sidecorresponding in curvature to the concave edge 8| and an arcuateopposite side corresponding in curvature to the curvature of the bore64' so that as the vane moves along the inner wall of they pumpchamber,lthe rocker member rotates slightly against the convex edgewhereby to maintain sealingI contact against the chamber wall throughoutsubstantially the width 'of the vane.The concave edge 8| and the convexedge 19 of the .vane are generated about a single center 80a which fallson` the interface betweenthe rocker member 83y and the wall of the pumpchamber, as indicated in Fig. 6a, and

throughthis arrangement the inner edge 19 of no possibility for the endsof-the bar being displaced through the slots. The yoke bar 55 has athreaded central opening within which is disposed a yoke screw .having athreaded portion 6| provided with a conicalpoint 62 and a handle portion63;

In operation, the yoke bar 55 is seated against theend `plate V49 androtated so as to bring the ends of the bar into the grooves 58 and 59 inthe manner shown in Fig. 7. 'I'hereupon the yoke screw is rotatedwhereby to apply pressure to the end plate 43, which in /turn appliespressure to -the cylinder member 42 the pressure being transmittedtherethrough to the vsleeve'26, whereby the parts are compressed andvVwhilerlny operation.` l The cylinder member 42 has a cylindrical cen-75 the vane, the plugy 82, the rocker member 83 and the innerl wall ofthe pump chamber are maintained in Contact throughout the funcircumference of the pump chamber, regardless of the elevation of thecylinder member and the consequent eccentricity of the spider memberwith `respect to the pumpchamber.

It will be seen thatup rotation of the shaft I6, the spider portion 39and the lvanes incorporated therein are rotated through the action ofthe squared end/ 31. and the squared bore 4|. y

If the spider member is concentric with respect tothe chamber 64, asshown in Fig. 2, no pumping action will occur, but with eccentricitytherebetween, for example, as shown in Fig. 6, liquid will be drawn.into lthe pump chamber through either the openings 69 or 1|, dependingupon the direction of rotation of the shaft` and will be dischargedthroughvthe other of said openings.

While the ends of the spider portion I9 are adapted to seat incloserelationship with the end walls of the pump chamber, namely, thelnner faces of the end vplate 48 and flange 21 and the vanes arelikewise adapted to seat in closely l fitting relationship therewith,yet in some circumstances a certain amount of leakage may occur andthematerial may tend to pass outward along the hub portion 38. Novel'meansare provided fo'r preventing this material from working inward along thecylindrical portionv I5 of the shaft I6, and for preventing its escapefrom the chamber. This means includes the conical. wall 94 commentingAthe bore I2 and counterbore 33,

` 2,287,369 the sloping `shoulder 36 connecting the shaft portions 35and 31, and also includes conical end 'walls 84 and 85 on the hubportion 38, which conical walls converge as shown at 86 (note Figs. 4and 5). This structure produces ran annular chamber 8l, of V-shapedcross-section as shown in Fig. 5, the edge occurring at 86V being oppo-vsite the space between the bore 32 and the cylindrical portion 35 of theshaft. Positioned in this chamber is a washer 88 of relatively stiffyetifflexible material, such, for example, as a fiber washer, thewidth'of the washer being such that when the parts are drawn into theoperating position as shown in Fig. 3, the washer is distorted as shownin Fig. by action ofthe edge 86,.thereby producing an annular line 'ofcontact between the edge 86 and the center portion of the washer,between the conical wall 36 `of theshaft and the inner edge portion ofthe washer, and between the conical Wall 3d and the outer edge of thewasher, these areas of contact being best shown isfactory structure forproducing a seal at this` point such that the parts may-alsobe Jreadilydisassembled, and' that this seal is highly effective for the purpose.However, I have pro: videdi vent opening gextending from the lowermostpoint in the chamber 3l to ytheyoutside so that should there be anyescape of material-into the chamber 3l,vthis material may drain outthrough the opening 89 and thereby avoid the production of pressurewithin the chamber 3i which might force the material back 'into themotor through the bore l5.

The structure heretofore described v,and shown in Fig. 5. I have ,foundthat this is avery satface ofthe yoke. bar'55,` and by removing the nut4I. Thereupon all of the parts of the pump .A

construction ,ofl the pump vane, the manner in. .which the capacity oflthe pump may be altered without disturbing other parts of the pump, andysimilar features heretofore described.

I claim:

l. The combination in a demountable pump of a yoke comprising A'acentral portion and spaced arms 'extending ltherefrom disposed invparallel disposed spaced relation and/forming a 'fixed frame'for thepump, a pump casing comprising a one-piece cylinder of relatively thickrigid material disposed between said arms having piane ends, projectingportions lanchored in said arms to retain the same against rotation,andvlaterally disposed inlet and outlet flanges, a'rotaryi movable Vaneimpeller in said cylinder, an end memin Figs. l tog, inclusive, has theadvantage ofV simplicity, but it will be noted from Fig. 6 that 'withmovement of the cylinder' member 42,'the

connecting members 65 and 66 also `move upward and downward, which hasthe disadvantage in some vinstances ofA disturbing the pipeconnections." Where this is-objectionable ra struc-,fl

ture such as 'shown in Fig. 10 may be employed, wherein comparable inleta d outlet connections designated as 65a and 66a re providedon the-sleeve portion 26 (which may be integral with the yokeif desired),rather than on the cylinder ymember 42, and have openings 1 ia and 69awhich Y rotation of the nut 4l, this capacity can be indi-y cated inthe'manner shown in Fig. B, wherein the nut has an arrow or otherindication as shown at 93 adapted to cooperate with a scale 94positioned on the upper surface of the arm l.

It will be seen that the pump structure is parber disposed between oneend of said cylinder and said central portion, sai-d end member and saidframe being shapedffor reception of the end member in free locatingabutment with said Y frame, an end member disposed against the oppositeend of said cylinder shaped for locating abutment with respect to saidarms, said end Imembers having plane accurately finished faces arrangedto abut ythe ends of said cylinder in sealing relationship to formtherein a pump chamber, and a clamp acting between said arms and thelast mentioned endmember manually operable .to compress said end`members and said cylinder against said central portion to press saidfaces against the" ends of said cylinder member and thereby seal thejunction therebetween Y against leakage, said arms and said clamp beingthe sole means for securing the parts together.

2. The combination in a demountable pump of a yoke comprising a centralportion and spaced arms extending therefrom disposed in paralleldisposed spaced relation andforming a vfixed-`l frame for the pump, ashaft extending through der being unobstructed for lateral movement ofti'cularly well adapted for the handling of viscous v or semi-fluidliquids. This particular pump is designed for the handling of icecream,but it should be noted that while designed for this purpose, it isequally Well suited for the handling of more fluid liquids. It will beseen that the pump can `be entirely disassembled or assembled by merelyrotating the yoke screw lthrough a part of a turn or suflicientto removetheconical point 62 thereof to a point below the plane of the inner saidcylinder with respect to said yoke, an end member disposed between oneend of said cylinder and said central portion, said end member and saidframe being shaped for reception of the` end member in free locatingabutment with said yoke,

and an end member disposed against the oppomentioned endmembermanuallyoperable to *y clamp being the sole means for securing the parts Atogether, and means acting between said cylinder rand one of said armsfor securing said cylinder in any of a plurality of fixed `adjustedpositions laterally between said arms.

3. The combination in a demountable rotary pump comprising a U-shapedframe having a cylindrical opening forming apump chamber,

end members having plane faces of substantially cylinder member withrespect to the end ,mem-y ber, one of said end members seating inllocating abutment against said frame member, said y centralportion andspaced arms, a demountable pump casing-comprising an inner end membershaped to interni; with said frame adjacent thel bottom of the U-shapedframe, a cylinder member slidable from the open end of the frame intoposition against a face of said end member, said cylinder interttingwith said arms to prevent rotation of the cylinder, and a second endmember also slidable from the open end of said frame into positionagainst the end of said cylinder to form a pump chamber and interflttingwith said arms to prevent rotation of said second member, said casinghaving inlet and outlet ports to said chamber, the ends of said cylinderbeing' plane and the faces of said end. members contacting said cylinderbeing plane through an' area-substantially greater than the end of saidcylinder, a clamp fitting between said arms and saidsecgreater area thanthe ends of said cylinder member shaped .to seat against the ends ofthe` cylinder member to complete the pump chamber and to permit slidinglateral movement of the casing having inlet and outlet Vportscommunicating with said chamber, and a quick releasable clamp actingbetween said arms andthe other of said end members to urge the endmembersV against the cylinder and apply pressure therebetween to confine'the cylinder member therebetween and prevent leakage from said chamber,arotatable vane type impeller within said pump chamber, and manuallyoperable means for moving the cylinder member laterally between fixedoperating positions to adjust the normal capacity of thepump. l

6. The combination in a demountable sanitary pump of a casing comprisinga cylinder member having plane ends and an opening forming a I vpumpchamber, and end members having plane faces shaped to seat against theends of said cyl- 'inder member to confine the ends ofthe pump ond endmember to urge said members into a'ssembled relation against saidcentral portion of the frame, a rotary impeller in said cyhnder, meansextending through the first mentioned end member for driving saidimpeller, and screw threaded 'means acting between said arms4 and saidcylinder memberfor sliding said cylinder .member laterally betweenadjusted operating positions to vary the capacity of the pump.

4. The combination in a rotary type sanitary pump, of a casingcomprising an end member having a plane face positioned to form one end;of a cylinder chamber and spaced arms integral therewith projectingtherefrom, the oppositeV Aends of said arms being free, an end platehavl chamber and align the cylinder member, said casing 'having inletand outlet ports communicating with said chamber,l a rotary vane typeimpeller in said chamber, spaced arms fixed with respect to one o! saidend members, intertting shape characteristics on Asaid cylinder memberand said armsA to prevent rotation of the cylinder member, clamp meansacting between said arms and the other of said end members for confining,the cylinder between the end members and ap- I plying pressuretherebetween, and manually opo ber disposed between said arms havingopen ends provided. with parallel plane faces and .laterally disposedopenings therein-providing inlets and outlets thereto, a flanged memberseated in said to provide a metal to metal seal at the ends of Asaidcylinder, said casing having `inlet and outlet ports communicating withsaid chamber,l a ro` tatable pump member removably seated on said shaftwithin said cylinder member, the foregoing parts being shapedfor freereception one against the other along the axis of said shaft, said pumpmember being slidable onto said shaft over the end thereof and havingvanes operative against the inner walls of said cylinder member, andmeans at the outer ends of said arms .urging the cylinder member, ,therotatable pump member, and the end plate together into assembledrelation with said shaft and Aagainst said end member to secure the pumpin assembled, sealed relationship.

5. The combination in a demountable sanitary pump of a frame memberhaving spaced arms, a pump casing comprising a cylinder member bel,tween said arms having plane ends and a central frame structure between.said arms in abutting relation with said frame structure and having aplanesurfacedn metal to metal abutting felation with one end face ofsaid cylinder member,

a rotatable vane impeller positioned 4in s'aid cylinderin endwiseabutting relationship with said flanged member and said end plate, andquick releasable means acting between said frame and said end plate forurging together into sealed operative relationship said end plate,cylinder, flanged member, and rotatable vane impeller constituting allparts of the pump contacting `material being pumped, and forsimultaneously said pump chamber,l spaced arms -flxed with'espect to oneof said end members and having longitudinal slots therein, key meansprojecting from said cylinder member for reception in said slots tolocate the cylinder member and prevent extending inwardly from the endsthereof, one of said slots terminating in a threaded `opening, a pumpcasing supported on said,y yoke comprising a cylinder member havingprojections on oprotation thereof, quick releasable clamp means 5 positesides thereof receivable in said slots to acting between said arms andthe other of said end plates for confining the cylinder between the endmembers and maintaining alignment thereof, and screw means actingbetween the projecting for moving the cylinder member laterally acrosssaid end member to vary the degree of relative eccentricity between the'cylinder member and the impeller to change the capacity of the pump.

support the cylinder member and confine said. member against rotation,screw means acting between said threaded opening and vone. of saidprojections to-move said cylinder member transmeans of said cylindermember and said arms i0 versely of its axis to 'adjust the capacity ofthe pump, end members positioned to abut against the ends of saidcylinder member to form a pump chamber, said casing having inlet andoutletv ports communicating with'said chamber, quick 9. 'Ihe combinationin a demountable pump of 1:,- acting- |means on said arms for urgingsaid mema pump casing comprising a yoke having a central member andspaced arms integral therewith extending therefrom disposed in paralleldisposed spaced relation and forming a fixed frame for the pump, acylinder member of relatively u having an opening, said casing havinginlet andA outlet ports communicating with said chamber, a shaftprojecting into said chamber through said 5, opening, a rotary pumpimpeller positioned in said chamber and driven by'saidshaft, said endwall and said shaft each having walls diagonally .disposed with respectto the longitudinal center line of said opening shaped to provide achamber arranged to abut the ends of said cylinder to 30 of V-shapedcross-section having the point thereclose the openings therein `and forma pump chamber, said casing having spaced inlet and outlet portscommunicating with said chamber, a vane type impeller in said chamber,and a clamp tral member to press said faces against the ends of said endmember and thereby seal the junction clamp being the sole means partsvtOEether.

10. 'I'he combination in a dmountable pump of a pumpcasing comprisingspaced end memfor securing the of terminating at the interface betweenthe shaft and said opening,..and a fiat ring of gasket maacting betweensaid arms and thev last mentioned 35- tween the parts.

v13. The combination in a rotary pump of -a ycylinder member having apump chamber, a

therebetween against leakage, said arms and said '40 hubl portion, andmeans for closing the end of the pump chamber comprising an end wallhaving 'an opening for said shaft, said hub, said end wall and saidshaft being shaped to provide a chamber of V-shaped cross-section havingthe point bers having plane opposed faces and aheavy 45thereofterminating at the interface betweenthe walled cylinder disposedbetween said facs having plane ends positioned to abut said plane facesto seal the ends of saidy cylinder and form a pump chamber, said casinghaving inlet and outlet ports to said chamber, a sliding vane type ro-50 tary pump element within said cylinder, Aa shaft projecting throughat least'oneof said end members to drive said pump element, means forurging .said end members together to press said faces against the endsof said cylinder and there- ,5 by seal the cylinder against leakage,said cylinder being the sole means for spacing said end members. andmeans for sliding said cylinder laterally with respect to said endmembers be-4 tions while so compressed to adjust said pump topreselected capacities.

11. 'I'he combination in a rotary pump of a yoke having a central-portion and parallel spaced arms, each of saidarms having open endedslots 6;,

, ber, a hub disposed within the end member and carried on said shaft,said hub having an end tapering' to a circular outwardly disposed edgeopposite the junction between said shaft and said endv member, and aresilient distortable washer tween any of a plurality of fixed operatingposi- G9 ring engaged at the midpoint of its periphery by said edge, theedges of said washer bearing against ysaid sloping surface and beingdistortedI by said edge'to close' the junction between the shaft and theend member. 1

. SWAN F.v ANDERSON.

